54 entries under main topic. ×

20
important(adjective, significant, original, essential, critical)
19
primary(adjective, lead, important, head, significant)
19
middle(noun, adjective, adverb, mean, edge)
18
key(adjective, lead, important, head, master)
18
cardinal(noun, adjective, lead, important, head)
17
focal(adjective, private, mental, focus)
16
fundamental(adjective, important, significant, original, essential)
16
essential(adjective, important, significant, original, basic)
16
chief(adjective, lead, important, head, significant)
16
median(noun, adjective, mean, edge)
15
interior(adjective, government, private, mental)
15
mid(adjective, adverb, mean, edge)
15
midway(noun, adjective, adverb, mean, edge)
15
pivotal(adjective, important, critical, vital)
15
prime(adjective, lead, important, head, significant)
14
inner(adjective, mean, remote, private)
14
principal(adjective, lead, important, head, significant)
12
nuclear(adjective, middle, principal, focal)
11
foremost(adjective, lead, head, significant, master)
10
leading(adjective, top, important, head, essential)
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APASmart Define. (2015). central thesaurus. Retrieved September 22, 2026, from https://smartdefine.org/central/thesaurus/synonyms
ChicagoSmart Define. 2015. "central thesaurus" https://smartdefine.org/central/thesaurus/synonyms (accessed September 22, 2026).
HarvardSmart Define 2015, central thesaurus, Smart Define, viewed 22 September, 2026, <https://smartdefine.org/central/thesaurus/synonyms>.
MLASmart Define. "central thesaurus" 10 April 2015. Web. 22 September 2026. <https://smartdefine.org/central/thesaurus/synonyms>